RANS Inc. Section 2
Model S-7LS COURIER Operating Limitations
Revision A January 08, 2008 2- 3
POWER PLANT LIMITATIONS
Number of Engines: 1
Engine Manufacturer: Rotax
Engine Model Number: 912 UL/S
Horsepower rating and
Engine speed (ISA):
Maximum Takeoff (max off 5 min): 98.5 HP at 5800 RPM
Max. Continuous : 92.5 HP at 5500 RPM
Idle (aprox.): 1400 RPM
►The engine allows operation with fully open throttle valve over the whole RPM
range without limitation. But full throttle performance above 5500 RPM is limited
to 5 minutes.
Minimum Oil Pressure : 12 PSI
Normal Operating Oil Pressure : 29 to 73 PSI
Maximum Oil Pressure: 100 PSI
Minimum Oil Temperature: 120° F
Normal Operating Oil Temperature: 190° to 230° F
Maximum Oil Temperature: 266° F
Maximum Cylinder Head Temperature: 275° F
Engine Start, Operating Temperature:
Maximum: 120° F
Minimum: - 13° F
Fuel Pressure
Minimum: 2.2 PSI
Maximum: 5.8 PSI
Acceleration:
Limit of engine operation at
zero gravity and in negative
g conditions: 5 seconds at max. –0.5 g
Fuel Grade: See fuel limitations
Oil Grade: SAE Motorcycle oil of registered
brand with gear additives.
Use only oil with API classification
“SF” or “SG”. Minimum
recommended viscosity 10W-40.
For additional information refer to
ROTAX Operators - and
Maintenance Manual.
►CAUTION: Do not use aircraft
engine oil
Propeller Manufacturer: Sensenich wood propeller Inc.
Propeller Model Number: W72RR
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